Safety InnovationsChildproof Your Windows and Sliding Doors with Our Window and Door Babyproof Safety Lock, (4-Pack)

I got these because my cats are nosey and like to poke their heads out the window, I live on the seventh floor of my building and my windows didn’t come with screens. When I need to air the house out (like if I’m cooking or if there’s a bad smell etc), I wanted to be able to open the windows without worrying that the cats will be able to wedge the window open further and get outside and plummet to their deaths. (Falls from windows are a very very frequent cause of death for housecats!)So far, I love these things. They were very easy to install. It was kind of hard to wrap my head around how they’d work just reading the instructions online, but when I got them out of the package it all clicked. They work well for both my sliding door and my swing-open window (probably not what they’re built for, but I stuck them outside of the windowsill and it works— see my photo). They are very easy to move in and out of their “locked” position, so you can open the window wider if you need to. Also, I didn’t have to worry about using them in front of my children, because my children are cats!

I installed this easily in my son's room on his four windows and as a result, he is able to still open the window but not dangerously which gives me peace of mind. High quality, smart design. Functions as expected.

These are great for a quick homeowner fix. THEY DO NOT meet building code requirements for ASTM F2090 in North Carolina.

So I ordered these because my great-granddaughter was afraid someone was going to climb into the bedroom while she was sleeping. They worked great. I did, however, have to do a safety thing with my great-grandson and soon realized my windows were way too tight for the children to escape in case of a fire. So I ended up peeling them off (not a problem to remove them at all - used a flathead screwdriver. It did the trick and did not break the window!) and I bought a bar for the window. :-) That works great and my great-grandson can just pull the little plug and raise the window to escape!

These are fantastic! Easy for a normal height adult to flip up to deactivate in case of a fire etc. They are super easy to put on and effective enough to keep a toddler safe but when I accidentally locked myself out of the house in 90 degree weather, I was able to force the window open even with this plastic device in place. I’m not sure yet If the device is actually compromised due the impact of shoving it open but I reset it and it’s still working as a safety device as of right now. It definately WOULD not keep out an intruder If they were motivated, but it would make a lot of noise and deter a less ambitious intruder.

I like the concept good product but easily breakable if not careful.

Really easy to install. These provide an extra sense of security. If you live on the first floor, it's great you can leave your windows open. Just a crack and they cannot be open from the outside. My children are older and I still use the safety locks

Simple, quick, and works as designed.Great for its purpose. The clear 3M adhesive sticks great to windows and installation takes mere seconds.As for the strength of the plastic, it seems sturdy enough to keep our two year old from breaking it. As a test, I tried opening the window with these in place, and they did their job without breaking. I’d say if you slammed the window against it with speed or great force they would break, but not under normal circumstances. That said, the tabs that ride in the body of unit are plastic. A metal dowel would be my preference.All in all, great!